Small Tinderbox Multifuel Stove, 5kW, ECODesign with up and out full height kit (137-SMF-TBOX-outside)
Ready for installation. A full external flue system that runs up the outside of a two storey building. Ideal when internal routing isn’t practical. No chimney required. Our experts offer a free design service if you need a variation on this system. Give us a call on 01670 206 999 if you think you might need a few changes to this standard kit.

At a Glance
- Efficient 5kW heating for small to medium-sized rooms
Versatile operation using both wood and smokeless fuels
Engineered with an up and out full height kit for external installations
EcoDesign approved ensuring reduced emissions and high efficiency
Complete package with essential TWPro components for a safe installation
Free design service to help tailor your installation to your space
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, June 10th. This is based on current delivery times for this product. Delivery for products not in our warehouses can be delayed because of third party carriers. If you need a stove, or other bulky product, to be delivered by a specific time in the next 7 days then please give us a call. We can sometimes reduce longer lead times if we pay the carrier £25 for express delivery. Visit our Shipping Information page for more information.
Warranty & Returns +
All our products come with warranties and you can read in our blog about they types and terms and conditions for warranties. Mi-Flex flue liner, for example, comes with a lifetime guarantee. Give us a call if you want to know about a specific warranty. Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.
Price Match Guarantee +
We will match any price, like-for-like, on a retail basis. Give us a call if you find it cheaper and want to buy from us.
We Won't Be Beaten On Price
At National Flues, we continuously monitor competitor prices. This ensures that we consistently offer you the best deals on all our products. Here’s how we keep your costs low:
- Daily Price Matching: Our team adjusts prices to ensure we stay competitive.
- Bulk Purchasing Power: We sell a lot, so we can negotiate better rates with suppliers, passing the savings directly to you.
- Operational Efficiency: We have streamlined processes to reduce overhead.
Price Match Guarantee: If you find the same product cheaper within 48 hours, we’ll match it and refund the difference.
Free Delivery Over £100: Orders over £100 are free delivery (call us if delivery is required outside the mainland UK).
“I saved 20% on my purchase compared to other retailers. Exceptional service!” – Jane D.
Have Questions?
Phone: 01670 206999
Email: [email protected]
- Info
- Specs
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- FAQs
Small Tinderbox Multifuel Stove :: with up and out full height kit :: with up and out full height... Discover the ultimate eco-friendly heating solution with our Small Tinderbox Multifuel Stove package! Boasting a 5kW output and ECODesign approval, this up and out full height kit is perfect for external installations.
Enjoy versatile heating with both wood and smokeless fuel options, coupled with a complete TWPro package including all essential components. With our free design service, creating an efficient, sustainable heating setup has never been easier. Transform your space with reliable performance and modern design.
Features & Benefits
5kW Heating Capacity
Delivers powerful, efficient heat output, making it ideal for small to medium rooms.
Multifuel Capability
Allows you to burn both wood and smokeless fuels, providing flexibility in fuel choices.
Up and Out Full Height Kit
Specifically engineered for robust external installations ensuring durability and optimal performance.
ECODesign Approved
Meets stringent energy efficiency and emission standards, safeguarding the environment.
Complete TWPro Package
Includes all necessary components for a compliant and secure installation without additional hassle.
Free Design Service
Expert design advice is provided at no extra cost to help plan your installation precisely whether for single or multi-storey setups.
SKU: 137-SMF-TBOX-outside
SKU | Product Name | Qty |
---|---|---|
37-125-005 | TWPro MB - Flat Adaptor - Ø 125 | 1 |
37-125-016 | TWPro MB - Adjustable Pipe 250-350mm - Ø 125 | 1 |
37-125-031 | TWPro MB - 45° Bend - Ø 125 | 1 |
37-125-010 | TWPro MB - Pipe 1000mm - Ø 125 | 7 |
37-125-034 | TWPro MB - 135° Tee - Ø 125 | 1 |
37-125-036 | TWPro MB - Tee Cap - Ø 125 | 1 |
37-125-011 | TWPro MB - Pipe 500mm - Ø 125 | 1 |
37-125-112 | TWPro MB - Rain Cap with Mesh - Ø 125 | 1 |
58-125-160 | TWPro MB - Retro Fit Base Support - Ø 125 | 1 |
58-125-052 | TWPro MB - Wall Support 80-130mm - Ø 125 | 3 |
15-125-100 | Wall Sleeve 45° Adjustable - Ø 125 | 1 |
58-125-114 | TWPro MB - MB Round Finishing Plate 45° (1 Piece) - Ø 125 | 1 |
58-125-097 | TWPro MB - Finishing Plate 30°-45° - Ø 125 | 1 |
37-125-012 | TWPro MB - Pipe 250mm - Ø 125 | 1 |
Technical Specifications | |
---|---|
Nominal Heat Output | 5kW |
Heat Output Range | 4-7.5kW |
Energy Efficiency Rating | A+ |
Wood Burning Efficiency | 81% |
CO Emissions | 0.09% @ 13% O2 |
Maximum Log Length | 480mm |
Flue Outlet | 5' Top or Rear |
Dimensions | 550mm (H) x 579mm (W) x 383mm (D) |
Weight | 86kg |
Eco Design Approved | Yes |
Smoke Control Exempt | Yes |
Cleanburn System | Yes |
Airwash System | Yes |
Direct Air Kit | Optional |
Grate Option | Optional |